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I need an experienced engineer who can take ownership of a large-scale, long-term product built around a .NET 8 / ASP.NET Core backend and a React.js + TypeScript frontend. Your first focus will be refining and extending our existing API layer, modelling new features, optimising performance, and making sure every endpoint is production-ready. Once the backend foundations are solid, you’ll move fluidly into the React codebase—building reusable components, wiring state with modern hooks, and ensuring the UX feels instant even when we lean on complex business logic. We already run in AWS, so you should be comfortable deploying microservices and event-driven workflows with containers (Docker) orchestrated through Kubernetes and managed via standard CI/CD pipelines. The infrastructure is written as code; if you can automate with PowerShell or similar scripts, even better. You’ll also touch auxiliary services written in Python (Django/FastAPI) and occasionally prototype AI-powered features with OpenAI or Azure equivalents, so a polyglot mindset is important even though .NET remains the core. Deliverables each sprint • New or enhanced .NET 8 endpoints with unit and integration tests • React.js features pushed to production behind feature flags • Kubernetes-ready Docker images and updated pipeline definitions • Clear documentation and concise pull-request notes We work in English, collaborate daily in GitHub, and expect 40+ hours of commitment for at least the next 12 months. If building reliable cloud software end-to-end excites you, I’d love to see your portfolio and talk through the roadmap. MUST BE FLUENT IN ENGLISH
Project ID: 40631176
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222 freelancers are bidding on average $21 USD/hour for this job

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in JavaScript, Python, .NET, Django, AngularJS, React.js, Docker, Kubernetes, .NET Core, CI/CD and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$25 USD in 5 days
8.5
8.5

With 5+ years in full-stack development, I'm well-versed in .NET 8, ASP.NET Core, React.js, and TypeScript. Your project aligns perfectly with my expertise. How do you envision the scalability of the API layer as we introduce new features and optimizations? Regards, Yogesh Kumar
$9 USD in 35 days
7.8
7.8

As a seasoned Senior Software Architect and Full-Stack Developer with over two decades of experience, I am confident that I possess the requisite skills, expertise, and mindset to deliver on your project's complex requirements. Throughout my extensive career, I have skillfully combined solid engineering fundamentals with leading-edge AI technology and cloud capabilities. This amalgamation has consistently resulted in the creation of reliable, performing, and future-ready applications - characteristics that align perfectly with your project's expectations. I bring particular strengths in efficient API design for high-volume systems, large scale data management and overhaul pipelines, as well as creating intelligent features using AI tools like OpenAI or Azure equivalents. Moreover, my having worked across multiple tech stacks including .NET Core (8), ASP.NET (Core), React.js and TypeScript ensures that I easily adapt to the nuances of any development environment. My multi-year commitment to the companies I've served demonstrates my dedication to long-term collaboration. I approach all projects with meticulousness and immense attention-to-detail, making me a perfect candidate for navigating your next 12 months' roadmap. Let's partner together to build something significant — leverage my expertise to create resilient cloud software that optimizes your business workflows and facilitates smarter decision-making throughout all levels of your organization.
$12 USD in 40 days
7.7
7.7

Hello, I have carefully reviewed your requirements for the Full Stack .NET React Engineer role and understand the need for a long-term developer who can take ownership of a large-scale product. **** You may follow the project's development using the tracker. I am available for work 40 hours a week **** I have 10+ years of experience in software development with strong expertise in .NET 8, ASP.NET Core, React.js, TypeScript, cloud-based applications, and scalable system architecture. I have hands-on experience building and optimizing APIs, developing reusable frontend components, integrating complex business logic, and delivering production-ready solutions. I am experienced with AWS, Docker, Kubernetes, CI/CD pipelines, microservices, event-driven workflows, and infrastructure automation using scripting. I can also work with Python-based services and integrate AI capabilities using OpenAI or Azure AI solutions when required. I eagerly await your positive response. Thanks.
$12 USD in 40 days
6.6
6.6

The main challenge here is keeping a large .NET 8/React platform maintainable while continuously shipping features—especially around API performance, event-driven services, Kubernetes deployments, and backward-compatible changes. I can take ownership across ASP.NET Core, React/TypeScript, Docker, CI/CD, AWS, and AI integrations. I’m fluent in English and available 40+ hours/week long-term. Let’s talk over chat and discuss there over a call.
$15 USD in 40 days
6.4
6.4

Hello dear, Greetings from Md. Toriqul Islam! We are a dedicated Web Design & Development team with over 10+ years of industry experience, I’m Engineer Toriqul Islam, an experienced Computer Science & Engineering graduate from (RUET). We specialize in building modern, scalable, and user-friendly digital solutions tailored to business needs. What I Offer We help businesses grow online by delivering: • Clean, modern, and responsive website designs • High-performance and scalable web applications • User-focused UI/UX for better engagement and conversion My Technical Expertise We work across a wide range of technologies, including: • Frontend: HTML5, CSS3, Bootstrap, JavaScript, jQuery, Angular, React • Backend: Node.js, PHP, Laravel, .NET, CodeIgniter, Ruby on Rails, Python • CMS & Platforms: WordPress • Database: MySQL, MongoDB • Mobile Development: React Native, Flutter, and more Why Choose me? ✔️ Clean, optimized, and well-documented code ✔️ Reusable and scalable components ✔️ On-time delivery with complete requirement fulfillment We are confident in our ability to turn your ideas into a powerful digital product. Let’s discuss your project and make it a success. Looking forward to working with you! Best Regards, Md. Toriqul Islam
$10 USD in 40 days
6.6
6.6

Hi, Your project reads like a classic case of needing someone who can move between backend discipline and frontend responsiveness without losing sight of the bigger reliability picture. The mix of .NET 8, React, and Kubernetes suggests the real work isn’t just writing endpoints—it’s keeping the whole stack consistent under load and change. I’ve done similar product work at CoastPay where we had to keep a React dashboard and .NET microservices tightly coupled while rolling out new features weekly. The part that usually breaks first is the API surface when business rules grow, so I’d start by auditing your endpoints for idempotency and realistic performance under load. The Kubernetes setup sounds familiar from Leadfish where we used Helm charts and GitHub Actions to spin up staging environments with each PR. The Python services you mentioned remind me of Herd’s AI layer, which was originally a FastAPI service eventually folded into the .NET stack—so the polyglot angle isn’t new. One thing that trips teams up is state consistency between React hooks and backend models; I’d lean on React Query or SWR early to keep the UI from drifting while you refactor the API contracts. Also, Python services can quietly become the bottleneck if you’re not watching their container resource limits in the same cluster. If this sounds like the kind of detail work you’re after, I’m happy to walk through the roadmap. Thanks, Denis
$8 USD in 40 days
6.4
6.4

Hello, I’m a Lead .NET Developer with 11+ years of experience building enterprise applications using .NET 8, ASP.NET Core, Web API, C#, SQL Server, and PostgreSQL. Your project is an excellent match for my background. I have extensive experience designing and enhancing REST APIs, implementing complex business logic, optimizing performance, and delivering clean, production-ready code. I also work with Docker, AWS, CI/CD pipelines, GitHub, and microservice-based applications. My primary frontend expertise is Blazor, and I also have experience working with React and TypeScript in existing codebases. Additionally, I have worked with Python services and integrated OpenAI APIs into .NET applications. I communicate fluently in English, have worked with remote teams across the US, Canada, Australia, and Europe, and I'm available full-time for a long-term commitment. I’d be happy to discuss your roadmap and explain how I can contribute to your project. Best regards, Noor All Safaet Lead .NET Developer
$15 USD in 40 days
6.7
6.7

Hi there, I carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. I am 15 years in this business and our technical specialists have strong experience in JavaScript, Python, .NET, Django, AngularJS, React.js, Docker, Kubernetes, .NET Core, CI/CD and other technologies relevant to your project. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Girish R.
$15 USD in 40 days
6.5
6.5

Hi, I can help you with "Full Stack .NET React Engineer" as per your given set of instructions. Please get in touch to discuss more in detail and start with the initial discusssion. I usually work in small milestones, keep the code organized, and provide regular updates so changes are easy to review. Let's discuss the current setup. I'll suggest the best implementation and an accurate timeline. ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$11 USD in 1 day
6.5
6.5

As an experienced Full Stack Engineer with expertise in .NET 8 and React.js, I am well-equipped to take ownership of your long-term product development. My approach will focus on refining and extending the existing API layer while optimizing performance to ensure that every endpoint is production-ready, contributing to seamless user experiences. Utilizing a comprehensive understanding of AWS, I will efficiently deploy microservices and orchestrate workflows using Docker and Kubernetes. My experience with infrastructure as code and scripting with PowerShell enables me to streamline automation processes, enhancing overall project efficiency. I'm also adept in auxiliary services written in Python, including Django and FastAPI. This polyglot mindset allows for flexible and innovative solutions, especially when prototyping AI-driven features. To ensure we maintain a clear path forward, I will deliver new or enhanced .NET endpoints, React features, and updated CI/CD pipelines each sprint, accompanied by thorough documentation and concise notes in pull requests. I am excited to discuss your roadmap and contribute to building reliable cloud software together. How do you envision the balance between enhancing existing features and developing new ones?
$25 USD in 29 days
5.9
5.9

Hello! We can provide an external team to support your product development end to end. 1. Are you open to working with an external contractor or team for these tasks? 2. Which tasks and technologies need to be covered first? — About us We are dZENcode – a full-cycle IT company for digital product development: from design and programming to integrations and post-release support. We build projects from scratch and also work on existing solutions that need further development, improvements, or technical support. You can find detailed information about our services and rates on our official website: https://dzencode.com. Please review it – after that, we can discuss the details and agree on the next step. ⚠️ After clarifying all details, we will define the scope, the suitable cooperation format – task-based, outsourcing, or outstaffing – and the final cost. Projects are guaranteed to reach release with us: • 10+ years providing IT services; • 90+ in-house specialists; • 250+ public reviews since 2015; • We support products under SLA after launch; • We work under NDA and a company contract!
$12 USD in 40 days
6.3
6.3

With over a decade of experience in full-stack development and a proven track record working with .NET, React.js, and the rest of the tools in your tech stack, I'm confident I can brilliantly deliver on this project. My approach to software development emphasizes high quality, scalability, and performance - all vital aspects that align perfectly with your needs. Throughout my career, I've handled projects with complex business logic and built production-ready APIs to great success. Moreover, I'm well-versed in deploying microservices with Kubernetes, managing CI/CD pipelines, and scripting automation tasks with PowerShell or similar tools. All these skills will enable me to carry out effectively the tasks expected of me in your project. I also possess a polyglot mindset which is crucial for any efficient full-stack developer and it's also noteworthy that my portfolio includes successful contributions to services written in Python (Django/FastAPI) similar to yours. Last but not least, I commit to delivering clear documentation and concise pull-request notes alongside the set deliverables ensuring that transparency remains at the core of our collaboration. Offering 40+ hours per week for the next 12 months, availability for daily collaboration on GitHub as well as fluency in English; are you ready to make your dream project a reality?
$10 USD in 40 days
5.8
5.8

Having spent over half a decade in the software development industry, I've acquired a refined skillset and a passion for ensuring the highest quality end-to-end product. Fluent in English and a communicative freelancer to the core, I'm comfortable collaborating on GitHub daily and guarantee clear documentation and detailed pull request notes. This'll help us maintain transparency as we work together on your Long-term project. I am keenly aware of the importance of high performance as well as error-free, production-ready codes. My expertise includes React.js- JavaScript which is clearly aligned with what you're looking for. Beyond this, my competencies extend to essential components such as Node.js which ties in with your focus on refining the existing API layer. Additionally, because you work on AWS,I can adequately deploy Kubernetes-ready Docker images. What sets me apart from other developers is my experience. I have built large scale applications from scratch, using React / ASP.NET Core architecture into AWS . Using CI/CD Pipelines for a productive workflow is second nature to me & container orchestration through Kubernetes is bread & butter. In addition to .NET & React, I am fluent in Python,Django/FastAPI which comes handy when working auxiliary services Let's hop onto a call so we can discuss your roadmap & missions further! The opportunity to bring my suite of skills to bear on your project excites me; let's build amazing software together!
$12 USD in 40 days
5.7
5.7

Hi, I'd love to join your team and contribute to your long-term product. I have strong experience building enterprise applications with .NET 8 / ASP.NET Core, React.js, TypeScript, AWS, Docker, Kubernetes, and CI/CD. I'm comfortable working across the full stack—from designing scalable APIs and optimizing backend performance to developing reusable React components and delivering responsive, production-ready user experiences. Beyond the core stack, I have experience with Python (FastAPI/Django), RESTful services, event-driven architectures, infrastructure automation, and AI integrations using OpenAI. I follow clean architecture, write maintainable code with unit and integration tests, and collaborate effectively through GitHub, code reviews, and Agile sprint workflows. I'm fluent in English, available for daily collaboration, and interested in a long-term commitment. Queries: Is the current solution based on a microservices architecture, or is it a modular monolith that will gradually be split into services? Which technologies are you currently using for CI/CD, Kubernetes deployment, and feature flag management (GitHub Actions, Azure DevOps, ArgoCD, LaunchDarkly, etc.)? I'm available for 40+ hours per week, can start immediately, and would be happy to discuss your roadmap and share relevant enterprise project experience during an interview.
$12 USD in 40 days
5.8
5.8

The approach focuses initially on refining the .NET 8 API endpoints with unit and integration tests to ensure reliability. Then I'll extend the React.js codebase using modern hooks to maintain performance and reusable components, managing complex state and logic for a responsive UX. Kubernetes orchestration for microservices and CI/CD automation will be implemented, leveraging Docker images and pipeline scripting, possibly using PowerShell. Python services with Django/FastAPI and AI prototyping will be integrated fluidly to support the polyglot architecture. Which existing API features do you prioritize for refinement and extension in the first sprint?
$15 USD in 28 days
5.2
5.2

Hi, I am a full-stack .NET and React developer with 8 years of rich experience in software development. I am familiar with C#, .NET 8, ASP.NET Core, React, TypeScript, Python, FastAPI, Docker, Kubernetes, AWS, and CI/CD. I can take ownership of the existing API layer, model new features, profile performance bottlenecks, and add unit and integration tests before extending the React interface with reusable, feature-flagged components. I am also comfortable maintaining containerized services, pipeline definitions, infrastructure workflows, and auxiliary Python or OpenAI integrations. I'm an individual freelancer, can commit 40+ hours per week for long-term cooperation, communicate clearly in English, and work in any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$15 USD in 40 days
5.4
5.4

FLUENT IN ENGLISH. Your project aligns well with my experience building enterprise web applications and scalable APIs. I have strong expertise in React.js, TypeScript, Angular, REST APIs, Docker, CI/CD, AWS, and backend development with PHP/Laravel, along with experience integrating AI features and third-party services. I'm comfortable working in Agile teams, GitHub workflows, and delivering production-ready, well-documented code. While my primary backend expertise is PHP rather than .NET, I'm a fast learner with solid experience in modern architectures, cloud deployments, and complex business applications. I'm available for long-term collaboration and can commit 40+ hours/week. I'd be happy to discuss your roadmap and see how I can contribute to the project.
$12 USD in 40 days
5.3
5.3

Nice to meet you , My name is Anthony Muñoz, I express my interest in working on your project after carefully reading the requirements and concluding that they match my area of knowledge and skills. I am currently the lead engineer for the IT agency DSPro and I have more than 10 years of experience in the field. I have successfully completed a large number of similar jobs and I consider your project to be a challenge in which I would like to work and be able to make it a reality. Please feel free to contact me, it will be my pleasure to help you. I greatly appreciate the time provided and I remain attentive to any questions or concerns. Greetings
$16 USD in 40 days
5.9
5.9

Hi, I have strong experience building and maintaining large-scale cloud applications using .NET Core, React, TypeScript, AWS, Docker, and Kubernetes. I can take ownership of your existing platform by first strengthening the .NET 8 / ASP.NET Core backend, improving API architecture, optimizing database performance, adding proper testing coverage, and preparing services for reliable production workloads. On the frontend side, I can extend your React + TypeScript application with reusable components, modern hooks, clean state management, and performance-focused UX improvements. I focus on writing maintainable code, clear documentation, strong testing practices, and smooth collaboration through GitHub workflows. I’d be happy to review your current architecture and discuss the roadmap. Best, Francisco
$12 USD in 40 days
5.0
5.0

Hempstead, United States
Member since Aug 6, 2026
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